Dweenabox: Portable microcontroller workstation

This is a portable, self-contained workstation for working with an Arduino or other microcontroller.
I designed it for our local library system which wishes to install the Arduino IDE on some of their publich workstations, and offer Arduino boards and associated accessories at the front desk for in-library checkout.
This box has a sliding lid that stores the controller and a breadboard inside the box to protect them when the lid is closed (inverted.)
The lid includes a lip which closes the clearance gap in the rear when the lid is inverted, and creates a vertical lip in front to trap parts when it is in use.
Inside is room to store jumpers, USB cable, power adapter (for use when not connected to the host computer), and a small parts box for LEDs, transistors, resistors, and basic chips like a shift register.
There should be room for most components that you would need to run through the basic Arduino tutorials such as those on the Adafruit Learning System.
The holes in the